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  1. MariaDB Server
  2. MDEV-20367

SIGSEGV with "Found wrong key definition..." warning

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      Description

      The attached issue_28287_bad.sql script kills MariaDb 10.2.17. The mysql-error.log contains

      2019-08-16 23:14:02 139832664938240 [ERROR] Found wrong key definition in summary_temporary; Please do "ALTER TABLE 'summary_temporary' FORCE " to fix it!
      2019-08-16 23:14:02 139832664938240 [ERROR] Found wrong key definition in summary_temporary; Please do "ALTER TABLE 'summary_temporary' FORCE " to fix it!
      190816 23:14:02 [ERROR] mysqld got signal 11 ;
      This could be because you hit a bug. It is also possible that this binary
      or one of the libraries it was linked against is corrupt, improperly built,
      or misconfigured. This error can also be caused by malfunctioning hardware.
       
      To report this bug, see https://mariadb.com/kb/en/reporting-bugs
       
      We will try our best to scrape up some info that will hopefully help
      diagnose the problem, but since we have already crashed, 
      something is definitely wrong and this may fail.
       
      Server version: 10.2.17-MariaDB-10.2.17+maria~precise-log
      key_buffer_size=104857600
      read_buffer_size=131072
      max_used_connections=5
      max_threads=202
      thread_count=9
      It is possible that mysqld could use up to 
      key_buffer_size + (read_buffer_size + sort_buffer_size)*max_threads = 546245 K  bytes of memory
      Hope that's ok; if not, decrease some variables in the equation.
       
      Thread pointer: 0x7f2ca80009a8
      Attempting backtrace. You can use the following information to find out
      where mysqld died. If you see no messages after this, something went
      terribly wrong...
      stack_bottom = 0x7f2d54524e50 thread_stack 0x49000
      *** buffer overflow detected ***: /usr/sbin/mysqld terminated
      ======= Backtrace: =========
      /lib/x86_64-linux-gnu/libc.so.6(__fortify_fail+0x37)[0x7f2d52511817]
      /lib/x86_64-linux-gnu/libc.so.6(+0x109710)[0x7f2d52510710]
      /lib/x86_64-linux-gnu/libc.so.6(+0x10a7ce)[0x7f2d525117ce]
      /usr/sbin/mysqld(my_addr_resolve+0xd8)[0xd7c8b8]
      /usr/sbin/mysqld(my_print_stacktrace+0x1bd)[0xd66b6d]
      /usr/sbin/mysqld(handle_fatal_signal+0x4c2)[0x7f3852]
      /lib/x86_64-linux-gnu/libpthread.so.0(+0xfcb0)[0x7f2d52dd1cb0]
      /lib/x86_64-linux-gnu/libc.so.6(+0x148059)[0x7f2d5254f059]
      /usr/sbin/mysqld[0xca3a21]
      /usr/sbin/mysqld[0xca4ca1]
      /usr/sbin/mysqld[0xca60fd]
      /usr/sbin/mysqld[0xcb18d4]
      /usr/sbin/mysqld(_ZN7handler12ha_write_rowEPh+0x33f)[0x7feb6f]
      /usr/sbin/mysqld(_Z12write_recordP3THDP5TABLEP12st_copy_info+0x73)[0x60f083]
      /usr/sbin/mysqld(_ZN13select_insert9send_dataER4ListI4ItemE+0xd2)[0x60fa32]
      /usr/sbin/mysqld[0x65daa7]
      /usr/sbin/mysqld[0x66198f]
      /usr/sbin/mysqld(_Z10sub_selectP4JOINP13st_join_tableb+0x176)[0x669d46]
      /usr/sbin/mysqld(_ZN4JOIN10exec_innerEv+0x90a)[0x68d36a]
      /usr/sbin/mysqld(_Z12mysql_selectP3THDP10TABLE_LISTjR4ListI4ItemEPS4_jP8st_orderS9_S7_S9_yP13select_resultP18st_select_lex_unitP13st_select_lex+0x14d)[0x68d84d]
      /usr/sbin/mysqld(_Z13handle_selectP3THDP3LEXP13select_resultm+0x24c)[0x68e66c]
      /usr/sbin/mysqld(_Z21mysql_execute_commandP3THD+0x7b44)[0x6320f4]
      /usr/sbin/mysqld(_Z11mysql_parseP3THDPcjP12Parser_statebb+0x2ae)[0x6333fe]
      /usr/sbin/mysqld(_Z16dispatch_command19enum_server_commandP3THDPcjbb+0x270a)[0x63652a]
      /usr/sbin/mysqld(_Z10do_commandP3THD+0x151)[0x636b31]
      /usr/sbin/mysqld(_Z24do_handle_one_connectionP7CONNECT+0x38b)[0x71ef2b]
      /usr/sbin/mysqld(handle_one_connection+0x3f)[0x71f00f]
      /lib/x86_64-linux-gnu/libpthread.so.0(+0x7e9a)[0x7f2d52dc9e9a]
      /lib/x86_64-linux-gnu/libc.so.6(clone+0x6d)[0x7f2d524faccd]
      ======= Memory map: ========
      00400000-01371000 r-xp 00000000 fc:01 932705                             /usr/sbin/mysqld
      01571000-0157b000 r--p 00f71000 fc:01 932705                             /usr/sbin/mysqld
      0157b000-01631000 rw-p 00f7b000 fc:01 932705                             /usr/sbin/mysqld
      01631000-01ec6000 rw-p 00000000 00:00 0 
      036ee000-07b00000 rw-p 00000000 00:00 0                                  [heap]
      7f2c84000000-7f2c84021000 rw-p 00000000 00:00 0 
      ...
      7f2d546ae000-7f2d546b3000 rw-p 00000000 00:00 0 
      7f2d546b3000-7f2d546b4000 r--p 00022000 fc:01 393415                     /lib/x86_64-linux-gnu/ld-2.15.so
      7f2d546b4000-7f2d546b6000 rw-p 00023000 fc:01 393415                     /lib/x86_64-linux-gnu/ld-2.15.so
      7fffe47d8000-7fffe47f9000 rw-p 00000000 00:00 0                          [stack]
      7fffe47ff000-7fffe4800000 r-xp 00000000 00:00 0                          [vdso]
      ffffffffff600000-ffffffffff601000 r-xp 00000000 00:00 0                  [vsyscall]
      Fatal signal 6 while backtracing
      

      The attached issue_28287_ok.sql script is virtually identical but it does not kill MariaDb 10.2.17. Instead the final statement has warnings, the same as in the error log:

      MariaDB [test]> show warnings;
      +---------+------+---------------------------------------------------------------------------------------------------------------+
      | Level   | Code | Message                                                                                                       |
      +---------+------+---------------------------------------------------------------------------------------------------------------+
      | Warning | 1194 | Found wrong key definition in summary_temporary; Please do "ALTER TABLE 'summary_temporary' FORCE" to fix it! |
      | Warning | 1194 | Found wrong key definition in summary_temporary; Please do "ALTER TABLE 'summary_temporary' FORCE" to fix it! |
      +---------+------+---------------------------------------------------------------------------------------------------------------+
      2 rows in set (0.00 sec)
      

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              • Assignee:
                Unassigned
                Reporter:
                jonathan.monahan@workbooks.com Jonathan Monahan
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                • Created:
                  Updated:
                  Resolved: